A. Faisal-Cury, P. R. Menezes, J. Quayle, K. Santiago, and A. Matijasevich, “The relationship between indicators of socioeconomic status and cesarean section in public hospitals”, Rev. saúde pública, vol. 51, p. 14, Jan. 2017, doi: 10.1590/s1518-8787.2017051006134.